Welcome to the Treehouse Community
Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community!
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.
Start your free trial
David Vine
1,542 PointsUnfortunately, Crystal Ball has stopped.
When I run my app, nothing happens except I get the message: Unfortunately, Crystal Ball has stopped. In logcat, the first issue it encounters is "error opening trace file: No such file or directory (2)". Then it has some lines of blue and green text, and then orange text that says "thread exiting with uncaught exception". Then red text "FATAL EXCEPTION: main". This message continues on for many lines.
8 Answers
Bert Carremans
3,179 PointsHi David,
have you tried setting breakpoints in your code and use the Debugger? Perhaps that gives you more information on what is going wrong.
Ben Jakuben
Treehouse TeacherFirst try what Bert suggested, and if you can't track down the error, post your MainActivity.java code in here as well as all the information you can get from logcat about the error.
danielplaisimnd
6,837 Pointspackage com.danye.crystalball;
import android.support.v7.app.ActionBarActivity; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem;
public class MainActivity extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="com.danye.crystalball.MainActivity" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/hello_world" />
</RelativeLayout>
Please help me Ben
Ines van Essen
2,139 PointsI'm facing the same issue. Curious to see if David has resolved this problem yet!
Derek Clickner
Courses Plus Student 581 PointsAnother facing the same issue. Did anyone find a fix for this?
Mukul Thakur
2,108 PointsI have the same issue. Please post a fix. Can't wait to continue! Thanks
Mitch Maynard
12,953 PointsI'm having the same issue. Anybody figure it out?
Ben Jakuben
Treehouse TeacherAny of you experiencing this issue, please paste in all the error lines after FATAL EXCEPTION: main. That is something known as a stack trace and it helps us troubleshoot where the root of the problem is by tracing through the different code that calls it. It includes a trace through all the system methods, which can be a little overwhelming, but we just need to zero in on the lines that have to do with our own code in MainActivity.
Reza Sadri
1,506 PointsI also get the same message. Below is detail of the LogCat: : 06-01 18:44:35.648: D/AndroidRuntime(1491): Shutting down VM 06-01 18:44:35.648: W/dalvikvm(1491): threadid=1: thread exiting with uncaught exception (group=0xb1a30ba8) 06-01 18:44:35.698: E/AndroidRuntime(1491): FATAL EXCEPTION: main 06-01 18:44:35.698: E/AndroidRuntime(1491): Process: com.ra.crystalball, PID: 1491 06-01 18:44:35.698: E/AndroidRuntime(1491): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.ra.crystalball/com.ra.crystalball.MainActivity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity. 06-01 18:44:35.698: E/AndroidRuntime(1491): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195) 06-01 18:44:35.698: E/AndroidRuntime(1491): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245) 06-01 18:44:35.698: E/AndroidRuntime(1491): at android.app.ActivityThread.access$800(ActivityThread.java:135) 06-01 18:44:35.698: E/AndroidRuntime(1491): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196) 06-01 18:44:35.698: E/AndroidRuntime(1491): at android.os.Handler.dispatchMessage(Handler.java:102) 06-01 18:44:35.698: E/AndroidRuntime(1491): at android.os.Looper.loop(Looper.java:136) 06-01 18:44:35.698: E/AndroidRuntime(1491): at android.app.ActivityThread.main(ActivityThread.java:5017) 06-01 18:44:35.698: E/AndroidRuntime(1491): at java.lang.reflect.Method.invokeNative(Native Method) 06-01 18:44:35.698: E/AndroidRuntime(1491): at java.lang.reflect.Method.invoke(Method.java:515) 06-01 18:44:35.698: E/AndroidRuntime(1491): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) 06-01 18:44:35.698: E/AndroidRuntime(1491): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 06-01 18:44:35.698: E/AndroidRuntime(1491): at dalvik.system.NativeStart.main(Native Method) 06-01 18:44:35.698: E/AndroidRuntime(1491): Caused by: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity. 06-01 18:44:35.698: E/AndroidRuntime(1491): at android.support.v7.app.ActionBarActivityDelegate.onCreate(ActionBarActivityDelegate.java:111) 06-01 18:44:35.698: E/AndroidRuntime(1491): at android.support.v7.app.ActionBarActivityDelegateICS.onCreate(ActionBarActivityDelegateICS.java:58) 06-01 18:44:35.698: E/AndroidRuntime(1491): at android.support.v7.app.ActionBarActivity.onCreate(ActionBarActivity.java:98) 06-01 18:44:35.698: E/AndroidRuntime(1491): at com.ra.crystalball.MainActivity.onCreate(MainActivity.java:25) 06-01 18:44:35.698: E/AndroidRuntime(1491): at android.app.Activity.performCreate(Activity.java:5231) 06-01 18:44:35.698: E/AndroidRuntime(1491): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 06-01 18:44:35.698: E/AndroidRuntime(1491): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159) 06-01 18:44:35.698: E/AndroidRuntime(1491): ... 11 more
Ben Jakuben
Treehouse TeacherHi Reza, check the Teacher's Notes here to help with this issue! If you continue to have trouble, please post a new question in the Forum. Good luck!